Home / 30,840.55-42,560.78-18,736.92

Finding the Fourth Proportional to 30,840.55, 42,560.78 and 18,736.92

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Solution

The fourth proportional to 30,840.55, 42,560.78 and 18,736.92 is: 25,857.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,840.55 : 42,560.78 = 18,736.92 : x
  2. Step 2: Convert to fraction form
    30,840.55/42,560.78 = 18,736.92/x
  3. Step 3: Cross multiply
    30,840.55x = 42,560.78 × 18,736.92
  4. Step 4: Simplify right side
    30,840.55x = 797,457,836.31
  5. Step 5: Solve for x
    x = 797,457,836.31/30,840.55
  6. Step 6: Final answer
    x = 25,857.45

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Half scale
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Double scale
Find fourth proportional to 30,841.55, 42,562.16 and 18,737.92
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.